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S13-9
(P)
ANATOMIC MEASUREMENTS OF PEDIATRIC ANTERIOR FEMALE GENITALIA
Katie BRODIE
1
, Erin GRANTHAM
1
, Patricia HUGUELET
2
, Brian CALDWELL
1
, Nicholas WESTFALL
1
and Duncan WILCOX
1
1) Children's Hospital Colorado, Department of Pediatric Urology, Aurora, USA - 2) Children's Hospital Colorado,
Department of Pediatric and Adolescent Gynecology, Aurora, USA
PURPOSE
Pediatric female genitalia size and morphology has not been previously well-described. Our aim was to create a
standard
reference for the anterior
vulval structures and examine the relationship between the clitoral hood and labia minora.
MATERIAL AND METHODS
Girls between 2 months
and 16 years of age, with normal external genitalia, had the following measurements taken:
length of clitoral hood, length of sides of clitoral hood, clitoral diameter, apex of clitoral hood to base of pubic symphysis,
apex of clitoral hood to urethral orifice, length and depth of labia minora. Qualitative descriptors of the clitoral hood and
labia were recorded. Patients were grouped into age ranges for analysis (12 years).
RESULTS
58 girls (Tanner stage 1-5) were examined. There was a linear relationship between age and genital structure size. For
each age group, the mean length of the clitoral hood was 8.7, 14.3, 16.9, 20.9 mm. Mean clitoral diameter was 2.5, 3.4,
3.9, 4.5 mm. Mean length of labia minora was 9.4, 10.7, 15.2 , 40 mm. Mean depth of labia minora was 3.5, 3.6, 3.9,
12.2 mm. Mean clitoral-urethral orifice distance was 12.4, 17.1 , 24.8, 39.4 mm. In 95% of patients, the labia minora
converged under the clitoral glans, separate to the clitoral hood.
CONCLUSIONS
External genitalia size and morphology is varied in the pediatric female population. The clitoral hood and labia minora
were observed to be distinctly separate structures.
This study provides a reference for surgeons undertaking genital
reconstruction procedures.